Old Temple Judaism was more henotheistic than monotheistic.
Henotheism:
a pluralistic theology wherein different deities are viewed to be of a unitary, equivalent divine essence; the worship of a single, supreme god that does not deny the existence or possible existence of other deities that may be worshipped.
Where in Scripture is it suggested that it is permissible to worship other deities or that various deities are equal reflections of God or in anyway comparable to Him?
Yahweh which simply refers to “I am” was kind of an ethnic god.
The statement "I am" is in and of itself a claim to cosmic sovereignty. It can also be read as "I am the One who Is."
"Ethnic god" claims refuted in OT passages:
Genesis 12:3 I will bless those who bless you, and him who dishonors you I will curse, and
in you all the families of the earth shall be blessed."
Genesis 22:18 "And in your offspring shall
all the nations of the earth be blessed, because you have obeyed my voice."
Psalm 22:27 "
All the ends of the earth shall remember and turn to the Lord"
Isaiah 2:2 "It shall come to pass in the latter days that the mountain of the house of the Lord shall be established as the highest of the mountains...
and all the nations shall flow to it."
Isaiah 49:6 "It is too light a thing that you should be my servant to raise up the tribes of Jacob...
I will make you as a light for the nations, that my salvation may reach to the end of the earth."
Jeremiah 3:17 "At that time Jerusalem shall be called the throne of the Lord, and
all nations shall gather to it, to the presence of the Lord in Jerusalem..."
The idea that there’s no God but God, and “I am” is a cosmic God starts emerging during the Babylonian exile with the tribe of Judahs exposure to Mazda.
Evidence to the contrary:
All of the creation account of Genesis
Deuteronomy 4:35 "To you it was shown, that you might know that the Lord is God;
there is no other besides him."
Deuteronomy 4:39 "Know therefore today, and lay it to your heart, that the Lord is God in heaven above and on the earth beneath;
there is no other."
Deuteronomy 32:39 "See now that I, even I, am he, and
there is no god beside me; I kill and I make alive; I wound and I heal; and there is none that can deliver out of my hand."
2 Samuel 7:22 "Therefore you are great, O Lord God.
For there is none like you, and there is no God besides you, according to all that we have heard with our ears."
1 Kings 8:23 "O Lord, God of Israel,
there is no God like you, in heaven above or on earth beneath, keeping covenant and showing steadfast love to your servants who walk before you with all their heart."
Psalm 86:8 "There is none like you among the gods, O Lord, nor are there any works like yours."
Isaiah 43:10-11 "
Before me no god was formed, nor shall there be any after me. I, I am the Lord, and besides me there is no savior."
Isaiah 44:6 "I am the first and I am the last; besides me there is no god."
Isaiah 45:5 "I am the Lord, and there is no other, besides me there is no God."
Isaiah 45:21-22 "And there is no other god besides me, a righteous God and a Savior; there is none besides me. Turn to me and be saved, all the ends of the earth! For I am God, and there is no other."
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I'm not sure if you realize that what you're saying is heretical and unsupported by Scripture? Your position denies the revelations of God to Abraham, Isaac, Jacob and Moses. Forgive me if I've misinterpreted your meaning.